Study on the quasistatic compression stress strain response of 93W Cu alloy based on real mesostructure reconstruction

This study integrates numerical simulation and experimental analysis to investigate the mesomechanical response of 93W Cu alloy under quasistatic compression, focusing on stress and strain distributions. The results reveal a highly heterogeneous distribution of stress and strain at the mesoscale, driven by the significant mechanical property mismatch between the tungsten and copper phases. Stress is predominantly concentrated in the high-modulus, high-strength tungsten skeleton, which serves as the primary load-bearing network, while macroscopic plastic strain is largely accommodated by the ductile copper binder phase through plastic flow. The deformation mechanism features sliding and rotation of tungsten particles along copper interfaces, with negligible plastic strain within the tungsten itself. This work elucidates the synergistic deformation mechanism, “hardphase load bearing and softphase flow”, in W Cu alloys, providing a theoretical foundation for optimizing macroscopic mechanical properties through mesostructural tailoring.